Measurement of the Y(nS) polarizations in pp collisions at √s=7 and 8 TeV

The LHCb Collaboration

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14 Citations (Scopus)

Abstract

The polarization of the Y(1S), Y(2S) and Y(3S) mesons, produced in pp collisions at centre-of-mass energies s=7 and 8 TeV, is measured using data samples collected by the LHCb experiment, corresponding to integrated luminosities of 1 and 2 fb−1, respectively. The measurements are performed in three polarization frames, using Y → μμ decays in the kinematic region of the transverse momentum pT Υ < 30 GeV/c and rapidity 2.2 < yY < 4.5. No large polarization is observed.

Original languageEnglish
Article number110
Number of pages60
JournalJournal of High Energy Physics
Volume2017
Issue number12
DOIs
Publication statusPublished - 1 Dec 2017

Keywords

  • Hadron-Hadron scattering (experiments)
  • Particle and resonance production
  • Polarization
  • QCD
  • DECAY
  • PARTICLES
  • J/PSI
  • J-PSI
  • INELASTIC PHOTOPRODUCTION
  • UPSILON
  • GENERAL-THEORY
  • HADRONIC PRODUCTION
  • PAIR PRODUCTION
  • TOOL

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